A gas-chromatographical method is described on which seven pyrrolizidine alkaloids (Fuchsisenecionine, Senecionine, Senecivernine, Senkirkine, Retrorsine, O7-Angelylheliotridine and Heliotrine) are determinated in a qualitative way and their ratio of concentration in Senecio fuchsii, vernalis, inaequidens and ovirensis, ssp. gaudinii.
Senecio fuchsii - Senecio vernalis - Senecio inaequidens - Senecio ovirensis, ssp. gaudinii - Asteraceae - Pyrrolizidine Alkaloids